I think Nolan and Pfister would do whatever they could to keep that from happening. It's an artistic choice they both made for the film, the color palette for each film is there for a reason. Just as TDKR will have it's own palette.

From what I can tell from the promotional stuff and the footage we have seen, TDKR has more grayish tones and contrasting black and white (think of the quick shadowed closeup of Bane in the trailer) while still incorporating hues from previous films.